What Causes Placental Blood Pool?

Placental blood pool, also known as placental venous lake, is a nearly circular dark area inside the placenta, which belongs to an imaging information. If the range of placental blood pool is relatively large, it may affect the exchange of villous blood flow. Generally, it will not cause adverse effects on the fetus and the pregnant woman. Placental blood pool may be caused by abnormal vascular rupture, fetal bleeding, etc., and should be treated in time.

The placental blood pool is formed due to abnormal vascular rupture. It is located in the central part of placental villi without villi, and is a large nearly circular dark area in the placental parenchyma. Fine light spots can be seen flowing into the dark area from the side wall. If the range is large, it will affect the exchange of villous blood flow.

The so-called blood pool refers to the situation of fetal bleeding in the placenta. After the fetus stops bleeding, the blood pool will stop increasing, and it will gradually dissipate and be eliminated from the body. This situation may be related to the environment or external force damage. After discovering the blood pool, attention should be paid to rest, and regular inspections should be carried out to check whether there is an increase in blood clots.

Placental blood pool is relatively common in clinical ultrasonography. Usually, especially small blood pools have no major impact on the fetus, and pregnant women will not have obvious discomfort. Large blood pools may be associated with adverse outcomes for the fetus, such as intrauterine growth restriction, sudden intrauterine death, and being smaller than gestational age. If the placental blood pool is close to the internal os of the cervix, it may cause massive hemorrhage during childbirth, which may have adverse effects on the fetus and the mother.